The flowers you received last week appear * wizened. * what will you do with them? why?

Wizened is an adjective that means shriveled, wrinkled, shrunken, etc. Given that these flowers have withered, there isn't much you can do. You can try to resurrect them by watering them, but that won't do much. You can put them in the herbarium, if you own one. Or you can simply throw them away.